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I think, you can just do the difference between the Counter objects.
def missingNumbers(arr, brr):
arr = Counter(arr)
brr = Counter(brr)
missing = brr - arr
return sorted(list(missing))
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Missing Numbers
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I think, you can just do the difference between the Counter objects. def missingNumbers(arr, brr): arr = Counter(arr) brr = Counter(brr) missing = brr - arr return sorted(list(missing))